drivers/gpu/drm/i830/i830_dma.c

   1 /* i830_dma.c -- DMA support for the I830 -*- linux-c -*-
   2  * Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
   3  *
   4  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   5  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25  * DEALINGS IN THE SOFTWARE.
  26  *
  27  * Authors: Rickard E. (Rik) Faith <faith@valinux.com>
  28  *          Jeff Hartmann <jhartmann@valinux.com>
  29  *          Keith Whitwell <keith@tungstengraphics.com>
  30  *          Abraham vd Merwe <abraham@2d3d.co.za>
  31  *
  32  */
  33
  34 #include "drmP.h"
  35 #include "drm.h"
  36 #include "i830_drm.h"
  37 #include "i830_drv.h"
  38 #include <linux/interrupt.h>    /* For task queue support */
  39 #include <linux/pagemap.h>
  40 #include <linux/delay.h>
  41 #include <asm/uaccess.h>
  42
  43 #define I830_BUF_FREE           2
  44 #define I830_BUF_CLIENT         1
  45 #define I830_BUF_HARDWARE       0
  46
  47 #define I830_BUF_UNMAPPED 0
  48 #define I830_BUF_MAPPED   1
  49
  50 static struct drm_buf *i830_freelist_get(struct drm_device * dev)
  51 {
  52         struct drm_device_dma *dma = dev->dma;
  53         int i;
  54         int used;
  55
  56         /* Linear search might not be the best solution */
  57
  58         for (i = 0; i < dma->buf_count; i++) {
  59                 struct drm_buf *buf = dma->buflist[i];
  60                 drm_i830_buf_priv_t *buf_priv = buf->dev_private;
  61                 /* In use is already a pointer */
  62                 used = cmpxchg(buf_priv->in_use, I830_BUF_FREE,
  63                                I830_BUF_CLIENT);
  64                 if (used == I830_BUF_FREE) {
  65                         return buf;
  66                 }
  67         }
  68         return NULL;
  69 }
  70
  71 /* This should only be called if the buffer is not sent to the hardware
  72  * yet, the hardware updates in use for us once its on the ring buffer.
  73  */
  74
  75 static int i830_freelist_put(struct drm_device * dev, struct drm_buf * buf)
  76 {
  77         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
  78         int used;
  79
  80         /* In use is already a pointer */
  81         used = cmpxchg(buf_priv->in_use, I830_BUF_CLIENT, I830_BUF_FREE);
  82         if (used != I830_BUF_CLIENT) {
  83                 DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
  84                 return -EINVAL;
  85         }
  86
  87         return 0;
  88 }
  89
  90 static int i830_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
  91 {
  92         struct drm_file *priv = filp->private_data;
  93         struct drm_device *dev;
  94         drm_i830_private_t *dev_priv;
  95         struct drm_buf *buf;
  96         drm_i830_buf_priv_t *buf_priv;
  97
  98         lock_kernel();
  99         dev = priv->minor->dev;
 100         dev_priv = dev->dev_private;
 101         buf = dev_priv->mmap_buffer;
 102         buf_priv = buf->dev_private;
 103
 104         vma->vm_flags |= (VM_IO | VM_DONTCOPY);
 105         vma->vm_file = filp;
 106
 107         buf_priv->currently_mapped = I830_BUF_MAPPED;
 108         unlock_kernel();
 109
 110         if (io_remap_pfn_range(vma, vma->vm_start,
 111                                vma->vm_pgoff,
 112                                vma->vm_end - vma->vm_start, vma->vm_page_prot))
 113                 return -EAGAIN;
 114         return 0;
 115 }
 116
 117 static const struct file_operations i830_buffer_fops = {
 118         .open = drm_open,
 119         .release = drm_release,
 120         .ioctl = drm_ioctl,
 121         .mmap = i830_mmap_buffers,
 122         .fasync = drm_fasync,
 123 };
 124
 125 static int i830_map_buffer(struct drm_buf * buf, struct drm_file *file_priv)
 126 {
 127         struct drm_device *dev = file_priv->minor->dev;
 128         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
 129         drm_i830_private_t *dev_priv = dev->dev_private;
 130         const struct file_operations *old_fops;
 131         unsigned long virtual;
 132         int retcode = 0;
 133
 134         if (buf_priv->currently_mapped == I830_BUF_MAPPED)
 135                 return -EINVAL;
 136
 137         down_write(&current->mm->mmap_sem);
 138         old_fops = file_priv->filp->f_op;
 139         file_priv->filp->f_op = &i830_buffer_fops;
 140         dev_priv->mmap_buffer = buf;
 141         virtual = do_mmap(file_priv->filp, 0, buf->total, PROT_READ | PROT_WRITE,
 142                           MAP_SHARED, buf->bus_address);
 143         dev_priv->mmap_buffer = NULL;
 144         file_priv->filp->f_op = old_fops;
 145         if (IS_ERR((void *)virtual)) {  /* ugh */
 146                 /* Real error */
 147                 DRM_ERROR("mmap error\n");
 148                 retcode = PTR_ERR((void *)virtual);
 149                 buf_priv->virtual = NULL;
 150         } else {
 151                 buf_priv->virtual = (void __user *)virtual;
 152         }
 153         up_write(&current->mm->mmap_sem);
 154
 155         return retcode;
 156 }
 157
 158 static int i830_unmap_buffer(struct drm_buf * buf)
 159 {
 160         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
 161         int retcode = 0;
 162
 163         if (buf_priv->currently_mapped != I830_BUF_MAPPED)
 164                 return -EINVAL;
 165
 166         down_write(&current->mm->mmap_sem);
 167         retcode = do_munmap(current->mm,
 168                             (unsigned long)buf_priv->virtual,
 169                             (size_t) buf->total);
 170         up_write(&current->mm->mmap_sem);
 171
 172         buf_priv->currently_mapped = I830_BUF_UNMAPPED;
 173         buf_priv->virtual = NULL;
 174
 175         return retcode;
 176 }
 177
 178 static int i830_dma_get_buffer(struct drm_device * dev, drm_i830_dma_t * d,
 179                                struct drm_file *file_priv)
 180 {
 181         struct drm_buf *buf;
 182         drm_i830_buf_priv_t *buf_priv;
 183         int retcode = 0;
 184
 185         buf = i830_freelist_get(dev);
 186         if (!buf) {
 187                 retcode = -ENOMEM;
 188                 DRM_DEBUG("retcode=%d\n", retcode);
 189                 return retcode;
 190         }
 191
 192         retcode = i830_map_buffer(buf, file_priv);
 193         if (retcode) {
 194                 i830_freelist_put(dev, buf);
 195                 DRM_ERROR("mapbuf failed, retcode %d\n", retcode);
 196                 return retcode;
 197         }
 198         buf->file_priv = file_priv;
 199         buf_priv = buf->dev_private;
 200         d->granted = 1;
 201         d->request_idx = buf->idx;
 202         d->request_size = buf->total;
 203         d->virtual = buf_priv->virtual;
 204
 205         return retcode;
 206 }
 207
 208 static int i830_dma_cleanup(struct drm_device * dev)
 209 {
 210         struct drm_device_dma *dma = dev->dma;
 211
 212         /* Make sure interrupts are disabled here because the uninstall ioctl
 213          * may not have been called from userspace and after dev_private
 214          * is freed, it's too late.
 215          */
 216         if (dev->irq_enabled)
 217                 drm_irq_uninstall(dev);
 218
 219         if (dev->dev_private) {
 220                 int i;
 221                 drm_i830_private_t *dev_priv =
 222                     (drm_i830_private_t *) dev->dev_private;
 223
 224                 if (dev_priv->ring.virtual_start) {
 225                         drm_core_ioremapfree(&dev_priv->ring.map, dev);
 226                 }
 227                 if (dev_priv->hw_status_page) {
 228                         pci_free_consistent(dev->pdev, PAGE_SIZE,
 229                                             dev_priv->hw_status_page,
 230                                             dev_priv->dma_status_page);
 231                         /* Need to rewrite hardware status page */
 232                         I830_WRITE(0x02080, 0x1ffff000);
 233                 }
 234
 235                 kfree(dev->dev_private);
 236                 dev->dev_private = NULL;
 237
 238                 for (i = 0; i < dma->buf_count; i++) {
 239                         struct drm_buf *buf = dma->buflist[i];
 240                         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
 241                         if (buf_priv->kernel_virtual && buf->total)
 242                                 drm_core_ioremapfree(&buf_priv->map, dev);
 243                 }
 244         }
 245         return 0;
 246 }
 247
 248 int i830_wait_ring(struct drm_device * dev, int n, const char *caller)
 249 {
 250         drm_i830_private_t *dev_priv = dev->dev_private;
 251         drm_i830_ring_buffer_t *ring = &(dev_priv->ring);
 252         int iters = 0;
 253         unsigned long end;
 254         unsigned int last_head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 255
 256         end = jiffies + (HZ * 3);
 257         while (ring->space < n) {
 258                 ring->head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 259                 ring->space = ring->head - (ring->tail + 8);
 260                 if (ring->space < 0)
 261                         ring->space += ring->Size;
 262
 263                 if (ring->head != last_head) {
 264                         end = jiffies + (HZ * 3);
 265                         last_head = ring->head;
 266                 }
 267
 268                 iters++;
 269                 if (time_before(end, jiffies)) {
 270                         DRM_ERROR("space: %d wanted %d\n", ring->space, n);
 271                         DRM_ERROR("lockup\n");
 272                         goto out_wait_ring;
 273                 }
 274                 udelay(1);
 275                 dev_priv->sarea_priv->perf_boxes |= I830_BOX_WAIT;
 276         }
 277
 278       out_wait_ring:
 279         return iters;
 280 }
 281
 282 static void i830_kernel_lost_context(struct drm_device * dev)
 283 {
 284         drm_i830_private_t *dev_priv = dev->dev_private;
 285         drm_i830_ring_buffer_t *ring = &(dev_priv->ring);
 286
 287         ring->head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 288         ring->tail = I830_READ(LP_RING + RING_TAIL) & TAIL_ADDR;
 289         ring->space = ring->head - (ring->tail + 8);
 290         if (ring->space < 0)
 291                 ring->space += ring->Size;
 292
 293         if (ring->head == ring->tail)
 294                 dev_priv->sarea_priv->perf_boxes |= I830_BOX_RING_EMPTY;
 295 }
 296
 297 static int i830_freelist_init(struct drm_device * dev, drm_i830_private_t * dev_priv)
 298 {
 299         struct drm_device_dma *dma = dev->dma;
 300         int my_idx = 36;
 301         u32 *hw_status = (u32 *) (dev_priv->hw_status_page + my_idx);
 302         int i;
 303
 304         if (dma->buf_count > 1019) {
 305                 /* Not enough space in the status page for the freelist */
 306                 return -EINVAL;
 307         }
 308
 309         for (i = 0; i < dma->buf_count; i++) {
 310                 struct drm_buf *buf = dma->buflist[i];
 311                 drm_i830_buf_priv_t *buf_priv = buf->dev_private;
 312
 313                 buf_priv->in_use = hw_status++;
 314                 buf_priv->my_use_idx = my_idx;
 315                 my_idx += 4;
 316
 317                 *buf_priv->in_use = I830_BUF_FREE;
 318
 319                 buf_priv->map.offset = buf->bus_address;
 320                 buf_priv->map.size = buf->total;
 321                 buf_priv->map.type = _DRM_AGP;
 322                 buf_priv->map.flags = 0;
 323                 buf_priv->map.mtrr = 0;
 324
 325                 drm_core_ioremap(&buf_priv->map, dev);
 326                 buf_priv->kernel_virtual = buf_priv->map.handle;
 327         }
 328         return 0;
 329 }
 330
 331 static int i830_dma_initialize(struct drm_device * dev,
 332                                drm_i830_private_t * dev_priv,
 333                                drm_i830_init_t * init)
 334 {
 335         struct drm_map_list *r_list;
 336
 337         memset(dev_priv, 0, sizeof(drm_i830_private_t));
 338
 339         list_for_each_entry(r_list, &dev->maplist, head) {
 340                 if (r_list->map &&
 341                     r_list->map->type == _DRM_SHM &&
 342                     r_list->map->flags & _DRM_CONTAINS_LOCK) {
 343                         dev_priv->sarea_map = r_list->map;
 344                         break;
 345                 }
 346         }
 347
 348         if (!dev_priv->sarea_map) {
 349                 dev->dev_private = (void *)dev_priv;
 350                 i830_dma_cleanup(dev);
 351                 DRM_ERROR("can not find sarea!\n");
 352                 return -EINVAL;
 353         }
 354         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 355         if (!dev_priv->mmio_map) {
 356                 dev->dev_private = (void *)dev_priv;
 357                 i830_dma_cleanup(dev);
 358                 DRM_ERROR("can not find mmio map!\n");
 359                 return -EINVAL;
 360         }
 361         dev->agp_buffer_token = init->buffers_offset;
 362         dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
 363         if (!dev->agp_buffer_map) {
 364                 dev->dev_private = (void *)dev_priv;
 365                 i830_dma_cleanup(dev);
 366                 DRM_ERROR("can not find dma buffer map!\n");
 367                 return -EINVAL;
 368         }
 369
 370         dev_priv->sarea_priv = (drm_i830_sarea_t *)
 371             ((u8 *) dev_priv->sarea_map->handle + init->sarea_priv_offset);
 372
 373         dev_priv->ring.Start = init->ring_start;
 374         dev_priv->ring.End = init->ring_end;
 375         dev_priv->ring.Size = init->ring_size;
 376
 377         dev_priv->ring.map.offset = dev->agp->base + init->ring_start;
 378         dev_priv->ring.map.size = init->ring_size;
 379         dev_priv->ring.map.type = _DRM_AGP;
 380         dev_priv->ring.map.flags = 0;
 381         dev_priv->ring.map.mtrr = 0;
 382
 383         drm_core_ioremap(&dev_priv->ring.map, dev);
 384
 385         if (dev_priv->ring.map.handle == NULL) {
 386                 dev->dev_private = (void *)dev_priv;
 387                 i830_dma_cleanup(dev);
 388                 DRM_ERROR("can not ioremap virtual address for"
 389                           " ring buffer\n");
 390                 return -ENOMEM;
 391         }
 392
 393         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 394
 395         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 396
 397         dev_priv->w = init->w;
 398         dev_priv->h = init->h;
 399         dev_priv->pitch = init->pitch;
 400         dev_priv->back_offset = init->back_offset;
 401         dev_priv->depth_offset = init->depth_offset;
 402         dev_priv->front_offset = init->front_offset;
 403
 404         dev_priv->front_di1 = init->front_offset | init->pitch_bits;
 405         dev_priv->back_di1 = init->back_offset | init->pitch_bits;
 406         dev_priv->zi1 = init->depth_offset | init->pitch_bits;
 407
 408         DRM_DEBUG("front_di1 %x\n", dev_priv->front_di1);
 409         DRM_DEBUG("back_offset %x\n", dev_priv->back_offset);
 410         DRM_DEBUG("back_di1 %x\n", dev_priv->back_di1);
 411         DRM_DEBUG("pitch_bits %x\n", init->pitch_bits);
 412
 413         dev_priv->cpp = init->cpp;
 414         /* We are using separate values as placeholders for mechanisms for
 415          * private backbuffer/depthbuffer usage.
 416          */
 417
 418         dev_priv->back_pitch = init->back_pitch;
 419         dev_priv->depth_pitch = init->depth_pitch;
 420         dev_priv->do_boxes = 0;
 421         dev_priv->use_mi_batchbuffer_start = 0;
 422
 423         /* Program Hardware Status Page */
 424         dev_priv->hw_status_page =
 425             pci_alloc_consistent(dev->pdev, PAGE_SIZE,
 426                                  &dev_priv->dma_status_page);
 427         if (!dev_priv->hw_status_page) {
 428                 dev->dev_private = (void *)dev_priv;
 429                 i830_dma_cleanup(dev);
 430                 DRM_ERROR("Can not allocate hardware status page\n");
 431                 return -ENOMEM;
 432         }
 433         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 434         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 435
 436         I830_WRITE(0x02080, dev_priv->dma_status_page);
 437         DRM_DEBUG("Enabled hardware status page\n");
 438
 439         /* Now we need to init our freelist */
 440         if (i830_freelist_init(dev, dev_priv) != 0) {
 441                 dev->dev_private = (void *)dev_priv;
 442                 i830_dma_cleanup(dev);
 443                 DRM_ERROR("Not enough space in the status page for"
 444                           " the freelist\n");
 445                 return -ENOMEM;
 446         }
 447         dev->dev_private = (void *)dev_priv;
 448
 449         return 0;
 450 }
 451
 452 static int i830_dma_init(struct drm_device *dev, void *data,
 453                          struct drm_file *file_priv)
 454 {
 455         drm_i830_private_t *dev_priv;
 456         drm_i830_init_t *init = data;
 457         int retcode = 0;
 458
 459         switch (init->func) {
 460         case I830_INIT_DMA:
 461                 dev_priv = kmalloc(sizeof(drm_i830_private_t), GFP_KERNEL);
 462                 if (dev_priv == NULL)
 463                         return -ENOMEM;
 464                 retcode = i830_dma_initialize(dev, dev_priv, init);
 465                 break;
 466         case I830_CLEANUP_DMA:
 467                 retcode = i830_dma_cleanup(dev);
 468                 break;
 469         default:
 470                 retcode = -EINVAL;
 471                 break;
 472         }
 473
 474         return retcode;
 475 }
 476
 477 #define GFX_OP_STIPPLE           ((0x3<<29)|(0x1d<<24)|(0x83<<16))
 478 #define ST1_ENABLE               (1<<16)
 479 #define ST1_MASK                 (0xffff)
 480
 481 /* Most efficient way to verify state for the i830 is as it is
 482  * emitted.  Non-conformant state is silently dropped.
 483  */
 484 static void i830EmitContextVerified(struct drm_device * dev, unsigned int *code)
 485 {
 486         drm_i830_private_t *dev_priv = dev->dev_private;
 487         int i, j = 0;
 488         unsigned int tmp;
 489         RING_LOCALS;
 490
 491         BEGIN_LP_RING(I830_CTX_SETUP_SIZE + 4);
 492
 493         for (i = 0; i < I830_CTXREG_BLENDCOLR0; i++) {
 494                 tmp = code[i];
 495                 if ((tmp & (7 << 29)) == CMD_3D &&
 496                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
 497                         OUT_RING(tmp);
 498                         j++;
 499                 } else {
 500                         DRM_ERROR("Skipping %d\n", i);
 501                 }
 502         }
 503
 504         OUT_RING(STATE3D_CONST_BLEND_COLOR_CMD);
 505         OUT_RING(code[I830_CTXREG_BLENDCOLR]);
 506         j += 2;
 507
 508         for (i = I830_CTXREG_VF; i < I830_CTXREG_MCSB0; i++) {
 509                 tmp = code[i];
 510                 if ((tmp & (7 << 29)) == CMD_3D &&
 511                     (tmp & (0x1f << 24)) < (0x1d << 24)) {
 512                         OUT_RING(tmp);
 513                         j++;
 514                 } else {
 515                         DRM_ERROR("Skipping %d\n", i);
 516                 }
 517         }
 518
 519         OUT_RING(STATE3D_MAP_COORD_SETBIND_CMD);
 520         OUT_RING(code[I830_CTXREG_MCSB1]);
 521         j += 2;
 522
 523         if (j & 1)
 524                 OUT_RING(0);
 525
 526         ADVANCE_LP_RING();
 527 }
 528
 529 static void i830EmitTexVerified(struct drm_device * dev, unsigned int *code)
 530 {
 531         drm_i830_private_t *dev_priv = dev->dev_private;
 532         int i, j = 0;
 533         unsigned int tmp;
 534         RING_LOCALS;
 535
 536         if (code[I830_TEXREG_MI0] == GFX_OP_MAP_INFO ||
 537             (code[I830_TEXREG_MI0] & ~(0xf * LOAD_TEXTURE_MAP0)) ==
 538             (STATE3D_LOAD_STATE_IMMEDIATE_2 | 4)) {
 539
 540                 BEGIN_LP_RING(I830_TEX_SETUP_SIZE);
 541
 542                 OUT_RING(code[I830_TEXREG_MI0]);        /* TM0LI */
 543                 OUT_RING(code[I830_TEXREG_MI1]);        /* TM0S0 */
 544                 OUT_RING(code[I830_TEXREG_MI2]);        /* TM0S1 */
 545                 OUT_RING(code[I830_TEXREG_MI3]);        /* TM0S2 */
 546                 OUT_RING(code[I830_TEXREG_MI4]);        /* TM0S3 */
 547                 OUT_RING(code[I830_TEXREG_MI5]);        /* TM0S4 */
 548
 549                 for (i = 6; i < I830_TEX_SETUP_SIZE; i++) {
 550                         tmp = code[i];
 551                         OUT_RING(tmp);
 552                         j++;
 553                 }
 554
 555                 if (j & 1)
 556                         OUT_RING(0);
 557
 558                 ADVANCE_LP_RING();
 559         } else
 560                 printk("rejected packet %x\n", code[0]);
 561 }
 562
 563 static void i830EmitTexBlendVerified(struct drm_device * dev,
 564                                      unsigned int *code, unsigned int num)
 565 {
 566         drm_i830_private_t *dev_priv = dev->dev_private;
 567         int i, j = 0;
 568         unsigned int tmp;
 569         RING_LOCALS;
 570
 571         if (!num)
 572                 return;
 573
 574         BEGIN_LP_RING(num + 1);
 575
 576         for (i = 0; i < num; i++) {
 577                 tmp = code[i];
 578                 OUT_RING(tmp);
 579                 j++;
 580         }
 581
 582         if (j & 1)
 583                 OUT_RING(0);
 584
 585         ADVANCE_LP_RING();
 586 }
 587
 588 static void i830EmitTexPalette(struct drm_device * dev,
 589                                unsigned int *palette, int number, int is_shared)
 590 {
 591         drm_i830_private_t *dev_priv = dev->dev_private;
 592         int i;
 593         RING_LOCALS;
 594
 595         return;
 596
 597         BEGIN_LP_RING(258);
 598
 599         if (is_shared == 1) {
 600                 OUT_RING(CMD_OP_MAP_PALETTE_LOAD |
 601                          MAP_PALETTE_NUM(0) | MAP_PALETTE_BOTH);
 602         } else {
 603                 OUT_RING(CMD_OP_MAP_PALETTE_LOAD | MAP_PALETTE_NUM(number));
 604         }
 605         for (i = 0; i < 256; i++) {
 606                 OUT_RING(palette[i]);
 607         }
 608         OUT_RING(0);
 609         /* KW:  WHERE IS THE ADVANCE_LP_RING?  This is effectively a noop!
 610          */
 611 }
 612
 613 /* Need to do some additional checking when setting the dest buffer.
 614  */
 615 static void i830EmitDestVerified(struct drm_device * dev, unsigned int *code)
 616 {
 617         drm_i830_private_t *dev_priv = dev->dev_private;
 618         unsigned int tmp;
 619         RING_LOCALS;
 620
 621         BEGIN_LP_RING(I830_DEST_SETUP_SIZE + 10);
 622
 623         tmp = code[I830_DESTREG_CBUFADDR];
 624         if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
 625                 if (((int)outring) & 8) {
 626                         OUT_RING(0);
 627                         OUT_RING(0);
 628                 }
 629
 630                 OUT_RING(CMD_OP_DESTBUFFER_INFO);
 631                 OUT_RING(BUF_3D_ID_COLOR_BACK |
 632                          BUF_3D_PITCH(dev_priv->back_pitch * dev_priv->cpp) |
 633                          BUF_3D_USE_FENCE);
 634                 OUT_RING(tmp);
 635                 OUT_RING(0);
 636
 637                 OUT_RING(CMD_OP_DESTBUFFER_INFO);
 638                 OUT_RING(BUF_3D_ID_DEPTH | BUF_3D_USE_FENCE |
 639                          BUF_3D_PITCH(dev_priv->depth_pitch * dev_priv->cpp));
 640                 OUT_RING(dev_priv->zi1);
 641                 OUT_RING(0);
 642         } else {
 643                 DRM_ERROR("bad di1 %x (allow %x or %x)\n",
 644                           tmp, dev_priv->front_di1, dev_priv->back_di1);
 645         }
 646
 647         /* invarient:
 648          */
 649
 650         OUT_RING(GFX_OP_DESTBUFFER_VARS);
 651         OUT_RING(code[I830_DESTREG_DV1]);
 652
 653         OUT_RING(GFX_OP_DRAWRECT_INFO);
 654         OUT_RING(code[I830_DESTREG_DR1]);
 655         OUT_RING(code[I830_DESTREG_DR2]);
 656         OUT_RING(code[I830_DESTREG_DR3]);
 657         OUT_RING(code[I830_DESTREG_DR4]);
 658
 659         /* Need to verify this */
 660         tmp = code[I830_DESTREG_SENABLE];
 661         if ((tmp & ~0x3) == GFX_OP_SCISSOR_ENABLE) {
 662                 OUT_RING(tmp);
 663         } else {
 664                 DRM_ERROR("bad scissor enable\n");
 665                 OUT_RING(0);
 666         }
 667
 668         OUT_RING(GFX_OP_SCISSOR_RECT);
 669         OUT_RING(code[I830_DESTREG_SR1]);
 670         OUT_RING(code[I830_DESTREG_SR2]);
 671         OUT_RING(0);
 672
 673         ADVANCE_LP_RING();
 674 }
 675
 676 static void i830EmitStippleVerified(struct drm_device * dev, unsigned int *code)
 677 {
 678         drm_i830_private_t *dev_priv = dev->dev_private;
 679         RING_LOCALS;
 680
 681         BEGIN_LP_RING(2);
 682         OUT_RING(GFX_OP_STIPPLE);
 683         OUT_RING(code[1]);
 684         ADVANCE_LP_RING();
 685 }
 686
 687 static void i830EmitState(struct drm_device * dev)
 688 {
 689         drm_i830_private_t *dev_priv = dev->dev_private;
 690         drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
 691         unsigned int dirty = sarea_priv->dirty;
 692
 693         DRM_DEBUG("%s %x\n", __func__, dirty);
 694
 695         if (dirty & I830_UPLOAD_BUFFERS) {
 696                 i830EmitDestVerified(dev, sarea_priv->BufferState);
 697                 sarea_priv->dirty &= ~I830_UPLOAD_BUFFERS;
 698         }
 699
 700         if (dirty & I830_UPLOAD_CTX) {
 701                 i830EmitContextVerified(dev, sarea_priv->ContextState);
 702                 sarea_priv->dirty &= ~I830_UPLOAD_CTX;
 703         }
 704
 705         if (dirty & I830_UPLOAD_TEX0) {
 706                 i830EmitTexVerified(dev, sarea_priv->TexState[0]);
 707                 sarea_priv->dirty &= ~I830_UPLOAD_TEX0;
 708         }
 709
 710         if (dirty & I830_UPLOAD_TEX1) {
 711                 i830EmitTexVerified(dev, sarea_priv->TexState[1]);
 712                 sarea_priv->dirty &= ~I830_UPLOAD_TEX1;
 713         }
 714
 715         if (dirty & I830_UPLOAD_TEXBLEND0) {
 716                 i830EmitTexBlendVerified(dev, sarea_priv->TexBlendState[0],
 717                                          sarea_priv->TexBlendStateWordsUsed[0]);
 718                 sarea_priv->dirty &= ~I830_UPLOAD_TEXBLEND0;
 719         }
 720
 721         if (dirty & I830_UPLOAD_TEXBLEND1) {
 722                 i830EmitTexBlendVerified(dev, sarea_priv->TexBlendState[1],
 723                                          sarea_priv->TexBlendStateWordsUsed[1]);
 724                 sarea_priv->dirty &= ~I830_UPLOAD_TEXBLEND1;
 725         }
 726
 727         if (dirty & I830_UPLOAD_TEX_PALETTE_SHARED) {
 728                 i830EmitTexPalette(dev, sarea_priv->Palette[0], 0, 1);
 729         } else {
 730                 if (dirty & I830_UPLOAD_TEX_PALETTE_N(0)) {
 731                         i830EmitTexPalette(dev, sarea_priv->Palette[0], 0, 0);
 732                         sarea_priv->dirty &= ~I830_UPLOAD_TEX_PALETTE_N(0);
 733                 }
 734                 if (dirty & I830_UPLOAD_TEX_PALETTE_N(1)) {
 735                         i830EmitTexPalette(dev, sarea_priv->Palette[1], 1, 0);
 736                         sarea_priv->dirty &= ~I830_UPLOAD_TEX_PALETTE_N(1);
 737                 }
 738
 739                 /* 1.3:
 740                  */
 741 #if 0
 742                 if (dirty & I830_UPLOAD_TEX_PALETTE_N(2)) {
 743                         i830EmitTexPalette(dev, sarea_priv->Palette2[0], 0, 0);
 744                         sarea_priv->dirty &= ~I830_UPLOAD_TEX_PALETTE_N(2);
 745                 }
 746                 if (dirty & I830_UPLOAD_TEX_PALETTE_N(3)) {
 747                         i830EmitTexPalette(dev, sarea_priv->Palette2[1], 1, 0);
 748                         sarea_priv->dirty &= ~I830_UPLOAD_TEX_PALETTE_N(2);
 749                 }
 750 #endif
 751         }
 752
 753         /* 1.3:
 754          */
 755         if (dirty & I830_UPLOAD_STIPPLE) {
 756                 i830EmitStippleVerified(dev, sarea_priv->StippleState);
 757                 sarea_priv->dirty &= ~I830_UPLOAD_STIPPLE;
 758         }
 759
 760         if (dirty & I830_UPLOAD_TEX2) {
 761                 i830EmitTexVerified(dev, sarea_priv->TexState2);
 762                 sarea_priv->dirty &= ~I830_UPLOAD_TEX2;
 763         }
 764
 765         if (dirty & I830_UPLOAD_TEX3) {
 766                 i830EmitTexVerified(dev, sarea_priv->TexState3);
 767                 sarea_priv->dirty &= ~I830_UPLOAD_TEX3;
 768         }
 769
 770         if (dirty & I830_UPLOAD_TEXBLEND2) {
 771                 i830EmitTexBlendVerified(dev,
 772                                          sarea_priv->TexBlendState2,
 773                                          sarea_priv->TexBlendStateWordsUsed2);
 774
 775                 sarea_priv->dirty &= ~I830_UPLOAD_TEXBLEND2;
 776         }
 777
 778         if (dirty & I830_UPLOAD_TEXBLEND3) {
 779                 i830EmitTexBlendVerified(dev,
 780                                          sarea_priv->TexBlendState3,
 781                                          sarea_priv->TexBlendStateWordsUsed3);
 782                 sarea_priv->dirty &= ~I830_UPLOAD_TEXBLEND3;
 783         }
 784 }
 785
 786 /* ================================================================
 787  * Performance monitoring functions
 788  */
 789
 790 static void i830_fill_box(struct drm_device * dev,
 791                           int x, int y, int w, int h, int r, int g, int b)
 792 {
 793         drm_i830_private_t *dev_priv = dev->dev_private;
 794         u32 color;
 795         unsigned int BR13, CMD;
 796         RING_LOCALS;
 797
 798         BR13 = (0xF0 << 16) | (dev_priv->pitch * dev_priv->cpp) | (1 << 24);
 799         CMD = XY_COLOR_BLT_CMD;
 800         x += dev_priv->sarea_priv->boxes[0].x1;
 801         y += dev_priv->sarea_priv->boxes[0].y1;
 802
 803         if (dev_priv->cpp == 4) {
 804                 BR13 |= (1 << 25);
 805                 CMD |= (XY_COLOR_BLT_WRITE_ALPHA | XY_COLOR_BLT_WRITE_RGB);
 806                 color = (((0xff) << 24) | (r << 16) | (g << 8) | b);
 807         } else {
 808                 color = (((r & 0xf8) << 8) |
 809                          ((g & 0xfc) << 3) | ((b & 0xf8) >> 3));
 810         }
 811
 812         BEGIN_LP_RING(6);
 813         OUT_RING(CMD);
 814         OUT_RING(BR13);
 815         OUT_RING((y << 16) | x);
 816         OUT_RING(((y + h) << 16) | (x + w));
 817
 818         if (dev_priv->current_page == 1) {
 819                 OUT_RING(dev_priv->front_offset);
 820         } else {
 821                 OUT_RING(dev_priv->back_offset);
 822         }
 823
 824         OUT_RING(color);
 825         ADVANCE_LP_RING();
 826 }
 827
 828 static void i830_cp_performance_boxes(struct drm_device * dev)
 829 {
 830         drm_i830_private_t *dev_priv = dev->dev_private;
 831
 832         /* Purple box for page flipping
 833          */
 834         if (dev_priv->sarea_priv->perf_boxes & I830_BOX_FLIP)
 835                 i830_fill_box(dev, 4, 4, 8, 8, 255, 0, 255);
 836
 837         /* Red box if we have to wait for idle at any point
 838          */
 839         if (dev_priv->sarea_priv->perf_boxes & I830_BOX_WAIT)
 840                 i830_fill_box(dev, 16, 4, 8, 8, 255, 0, 0);
 841
 842         /* Blue box: lost context?
 843          */
 844         if (dev_priv->sarea_priv->perf_boxes & I830_BOX_LOST_CONTEXT)
 845                 i830_fill_box(dev, 28, 4, 8, 8, 0, 0, 255);
 846
 847         /* Yellow box for texture swaps
 848          */
 849         if (dev_priv->sarea_priv->perf_boxes & I830_BOX_TEXTURE_LOAD)
 850                 i830_fill_box(dev, 40, 4, 8, 8, 255, 255, 0);
 851
 852         /* Green box if hardware never idles (as far as we can tell)
 853          */
 854         if (!(dev_priv->sarea_priv->perf_boxes & I830_BOX_RING_EMPTY))
 855                 i830_fill_box(dev, 64, 4, 8, 8, 0, 255, 0);
 856
 857         /* Draw bars indicating number of buffers allocated
 858          * (not a great measure, easily confused)
 859          */
 860         if (dev_priv->dma_used) {
 861                 int bar = dev_priv->dma_used / 10240;
 862                 if (bar > 100)
 863                         bar = 100;
 864                 if (bar < 1)
 865                         bar = 1;
 866                 i830_fill_box(dev, 4, 16, bar, 4, 196, 128, 128);
 867                 dev_priv->dma_used = 0;
 868         }
 869
 870         dev_priv->sarea_priv->perf_boxes = 0;
 871 }
 872
 873 static void i830_dma_dispatch_clear(struct drm_device * dev, int flags,
 874                                     unsigned int clear_color,
 875                                     unsigned int clear_zval,
 876                                     unsigned int clear_depthmask)
 877 {
 878         drm_i830_private_t *dev_priv = dev->dev_private;
 879         drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
 880         int nbox = sarea_priv->nbox;
 881         struct drm_clip_rect *pbox = sarea_priv->boxes;
 882         int pitch = dev_priv->pitch;
 883         int cpp = dev_priv->cpp;
 884         int i;
 885         unsigned int BR13, CMD, D_CMD;
 886         RING_LOCALS;
 887
 888         if (dev_priv->current_page == 1) {
 889                 unsigned int tmp = flags;
 890
 891                 flags &= ~(I830_FRONT | I830_BACK);
 892                 if (tmp & I830_FRONT)
 893                         flags |= I830_BACK;
 894                 if (tmp & I830_BACK)
 895                         flags |= I830_FRONT;
 896         }
 897
 898         i830_kernel_lost_context(dev);
 899
 900         switch (cpp) {
 901         case 2:
 902                 BR13 = (0xF0 << 16) | (pitch * cpp) | (1 << 24);
 903                 D_CMD = CMD = XY_COLOR_BLT_CMD;
 904                 break;
 905         case 4:
 906                 BR13 = (0xF0 << 16) | (pitch * cpp) | (1 << 24) | (1 << 25);
 907                 CMD = (XY_COLOR_BLT_CMD | XY_COLOR_BLT_WRITE_ALPHA |
 908                        XY_COLOR_BLT_WRITE_RGB);
 909                 D_CMD = XY_COLOR_BLT_CMD;
 910                 if (clear_depthmask & 0x00ffffff)
 911                         D_CMD |= XY_COLOR_BLT_WRITE_RGB;
 912                 if (clear_depthmask & 0xff000000)
 913                         D_CMD |= XY_COLOR_BLT_WRITE_ALPHA;
 914                 break;
 915         default:
 916                 BR13 = (0xF0 << 16) | (pitch * cpp) | (1 << 24);
 917                 D_CMD = CMD = XY_COLOR_BLT_CMD;
 918                 break;
 919         }
 920
 921         if (nbox > I830_NR_SAREA_CLIPRECTS)
 922                 nbox = I830_NR_SAREA_CLIPRECTS;
 923
 924         for (i = 0; i < nbox; i++, pbox++) {
 925                 if (pbox->x1 > pbox->x2 ||
 926                     pbox->y1 > pbox->y2 ||
 927                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
 928                         continue;
 929
 930                 if (flags & I830_FRONT) {
 931                         DRM_DEBUG("clear front\n");
 932                         BEGIN_LP_RING(6);
 933                         OUT_RING(CMD);
 934                         OUT_RING(BR13);
 935                         OUT_RING((pbox->y1 << 16) | pbox->x1);
 936                         OUT_RING((pbox->y2 << 16) | pbox->x2);
 937                         OUT_RING(dev_priv->front_offset);
 938                         OUT_RING(clear_color);
 939                         ADVANCE_LP_RING();
 940                 }
 941
 942                 if (flags & I830_BACK) {
 943                         DRM_DEBUG("clear back\n");
 944                         BEGIN_LP_RING(6);
 945                         OUT_RING(CMD);
 946                         OUT_RING(BR13);
 947                         OUT_RING((pbox->y1 << 16) | pbox->x1);
 948                         OUT_RING((pbox->y2 << 16) | pbox->x2);
 949                         OUT_RING(dev_priv->back_offset);
 950                         OUT_RING(clear_color);
 951                         ADVANCE_LP_RING();
 952                 }
 953
 954                 if (flags & I830_DEPTH) {
 955                         DRM_DEBUG("clear depth\n");
 956                         BEGIN_LP_RING(6);
 957                         OUT_RING(D_CMD);
 958                         OUT_RING(BR13);
 959                         OUT_RING((pbox->y1 << 16) | pbox->x1);
 960                         OUT_RING((pbox->y2 << 16) | pbox->x2);
 961                         OUT_RING(dev_priv->depth_offset);
 962                         OUT_RING(clear_zval);
 963                         ADVANCE_LP_RING();
 964                 }
 965         }
 966 }
 967
 968 static void i830_dma_dispatch_swap(struct drm_device * dev)
 969 {
 970         drm_i830_private_t *dev_priv = dev->dev_private;
 971         drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
 972         int nbox = sarea_priv->nbox;
 973         struct drm_clip_rect *pbox = sarea_priv->boxes;
 974         int pitch = dev_priv->pitch;
 975         int cpp = dev_priv->cpp;
 976         int i;
 977         unsigned int CMD, BR13;
 978         RING_LOCALS;
 979
 980         DRM_DEBUG("swapbuffers\n");
 981
 982         i830_kernel_lost_context(dev);
 983
 984         if (dev_priv->do_boxes)
 985                 i830_cp_performance_boxes(dev);
 986
 987         switch (cpp) {
 988         case 2:
 989                 BR13 = (pitch * cpp) | (0xCC << 16) | (1 << 24);
 990                 CMD = XY_SRC_COPY_BLT_CMD;
 991                 break;
 992         case 4:
 993                 BR13 = (pitch * cpp) | (0xCC << 16) | (1 << 24) | (1 << 25);
 994                 CMD = (XY_SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
 995                        XY_SRC_COPY_BLT_WRITE_RGB);
 996                 break;
 997         default:
 998                 BR13 = (pitch * cpp) | (0xCC << 16) | (1 << 24);
 999                 CMD = XY_SRC_COPY_BLT_CMD;
1000                 break;
1001         }
1002
1003         if (nbox > I830_NR_SAREA_CLIPRECTS)
1004                 nbox = I830_NR_SAREA_CLIPRECTS;
1005
1006         for (i = 0; i < nbox; i++, pbox++) {
1007                 if (pbox->x1 > pbox->x2 ||
1008                     pbox->y1 > pbox->y2 ||
1009                     pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
1010                         continue;
1011
1012                 DRM_DEBUG("dispatch swap %d,%d-%d,%d!\n",
1013                           pbox->x1, pbox->y1, pbox->x2, pbox->y2);
1014
1015                 BEGIN_LP_RING(8);
1016                 OUT_RING(CMD);
1017                 OUT_RING(BR13);
1018                 OUT_RING((pbox->y1 << 16) | pbox->x1);
1019                 OUT_RING((pbox->y2 << 16) | pbox->x2);
1020
1021                 if (dev_priv->current_page == 0)
1022                         OUT_RING(dev_priv->front_offset);
1023                 else
1024                         OUT_RING(dev_priv->back_offset);
1025
1026                 OUT_RING((pbox->y1 << 16) | pbox->x1);
1027                 OUT_RING(BR13 & 0xffff);
1028
1029                 if (dev_priv->current_page == 0)
1030                         OUT_RING(dev_priv->back_offset);
1031                 else
1032                         OUT_RING(dev_priv->front_offset);
1033
1034                 ADVANCE_LP_RING();
1035         }
1036 }
1037
1038 static void i830_dma_dispatch_flip(struct drm_device * dev)
1039 {
1040         drm_i830_private_t *dev_priv = dev->dev_private;
1041         RING_LOCALS;
1042
1043         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
1044                   __func__,
1045                   dev_priv->current_page,
1046                   dev_priv->sarea_priv->pf_current_page);
1047
1048         i830_kernel_lost_context(dev);
1049
1050         if (dev_priv->do_boxes) {
1051                 dev_priv->sarea_priv->perf_boxes |= I830_BOX_FLIP;
1052                 i830_cp_performance_boxes(dev);
1053         }
1054
1055         BEGIN_LP_RING(2);
1056         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
1057         OUT_RING(0);
1058         ADVANCE_LP_RING();
1059
1060         BEGIN_LP_RING(6);
1061         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
1062         OUT_RING(0);
1063         if (dev_priv->current_page == 0) {
1064                 OUT_RING(dev_priv->back_offset);
1065                 dev_priv->current_page = 1;
1066         } else {
1067                 OUT_RING(dev_priv->front_offset);
1068                 dev_priv->current_page = 0;
1069         }
1070         OUT_RING(0);
1071         ADVANCE_LP_RING();
1072
1073         BEGIN_LP_RING(2);
1074         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
1075         OUT_RING(0);
1076         ADVANCE_LP_RING();
1077
1078         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1079 }
1080
1081 static void i830_dma_dispatch_vertex(struct drm_device * dev,
1082                                      struct drm_buf * buf, int discard, int used)
1083 {
1084         drm_i830_private_t *dev_priv = dev->dev_private;
1085         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
1086         drm_i830_sarea_t *sarea_priv = dev_priv->sarea_priv;
1087         struct drm_clip_rect *box = sarea_priv->boxes;
1088         int nbox = sarea_priv->nbox;
1089         unsigned long address = (unsigned long)buf->bus_address;
1090         unsigned long start = address - dev->agp->base;
1091         int i = 0, u;
1092         RING_LOCALS;
1093
1094         i830_kernel_lost_context(dev);
1095
1096         if (nbox > I830_NR_SAREA_CLIPRECTS)
1097                 nbox = I830_NR_SAREA_CLIPRECTS;
1098
1099         if (discard) {
1100                 u = cmpxchg(buf_priv->in_use, I830_BUF_CLIENT,
1101                             I830_BUF_HARDWARE);
1102                 if (u != I830_BUF_CLIENT) {
1103                         DRM_DEBUG("xxxx 2\n");
1104                 }
1105         }
1106
1107         if (used > 4 * 1023)
1108                 used = 0;
1109
1110         if (sarea_priv->dirty)
1111                 i830EmitState(dev);
1112
1113         DRM_DEBUG("dispatch vertex addr 0x%lx, used 0x%x nbox %d\n",
1114                   address, used, nbox);
1115
1116         dev_priv->counter++;
1117         DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
1118         DRM_DEBUG("i830_dma_dispatch\n");
1119         DRM_DEBUG("start : %lx\n", start);
1120         DRM_DEBUG("used : %d\n", used);
1121         DRM_DEBUG("start + used - 4 : %ld\n", start + used - 4);
1122
1123         if (buf_priv->currently_mapped == I830_BUF_MAPPED) {
1124                 u32 *vp = buf_priv->kernel_virtual;
1125
1126                 vp[0] = (GFX_OP_PRIMITIVE |
1127                          sarea_priv->vertex_prim | ((used / 4) - 2));
1128
1129                 if (dev_priv->use_mi_batchbuffer_start) {
1130                         vp[used / 4] = MI_BATCH_BUFFER_END;
1131                         used += 4;
1132                 }
1133
1134                 if (used & 4) {
1135                         vp[used / 4] = 0;
1136                         used += 4;
1137                 }
1138
1139                 i830_unmap_buffer(buf);
1140         }
1141
1142         if (used) {
1143                 do {
1144                         if (i < nbox) {
1145                                 BEGIN_LP_RING(6);
1146                                 OUT_RING(GFX_OP_DRAWRECT_INFO);
1147                                 OUT_RING(sarea_priv->
1148                                          BufferState[I830_DESTREG_DR1]);
1149                                 OUT_RING(box[i].x1 | (box[i].y1 << 16));
1150                                 OUT_RING(box[i].x2 | (box[i].y2 << 16));
1151                                 OUT_RING(sarea_priv->
1152                                          BufferState[I830_DESTREG_DR4]);
1153                                 OUT_RING(0);
1154                                 ADVANCE_LP_RING();
1155                         }
1156
1157                         if (dev_priv->use_mi_batchbuffer_start) {
1158                                 BEGIN_LP_RING(2);
1159                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
1160                                 OUT_RING(start | MI_BATCH_NON_SECURE);
1161                                 ADVANCE_LP_RING();
1162                         } else {
1163                                 BEGIN_LP_RING(4);
1164                                 OUT_RING(MI_BATCH_BUFFER);
1165                                 OUT_RING(start | MI_BATCH_NON_SECURE);
1166                                 OUT_RING(start + used - 4);
1167                                 OUT_RING(0);
1168                                 ADVANCE_LP_RING();
1169                         }
1170
1171                 } while (++i < nbox);
1172         }
1173
1174         if (discard) {
1175                 dev_priv->counter++;
1176
1177                 (void)cmpxchg(buf_priv->in_use, I830_BUF_CLIENT,
1178                               I830_BUF_HARDWARE);
1179
1180                 BEGIN_LP_RING(8);
1181                 OUT_RING(CMD_STORE_DWORD_IDX);
1182                 OUT_RING(20);
1183                 OUT_RING(dev_priv->counter);
1184                 OUT_RING(CMD_STORE_DWORD_IDX);
1185                 OUT_RING(buf_priv->my_use_idx);
1186                 OUT_RING(I830_BUF_FREE);
1187                 OUT_RING(CMD_REPORT_HEAD);
1188                 OUT_RING(0);
1189                 ADVANCE_LP_RING();
1190         }
1191 }
1192
1193 static void i830_dma_quiescent(struct drm_device * dev)
1194 {
1195         drm_i830_private_t *dev_priv = dev->dev_private;
1196         RING_LOCALS;
1197
1198         i830_kernel_lost_context(dev);
1199
1200         BEGIN_LP_RING(4);
1201         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
1202         OUT_RING(CMD_REPORT_HEAD);
1203         OUT_RING(0);
1204         OUT_RING(0);
1205         ADVANCE_LP_RING();
1206
1207         i830_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
1208 }
1209
1210 static int i830_flush_queue(struct drm_device * dev)
1211 {
1212         drm_i830_private_t *dev_priv = dev->dev_private;
1213         struct drm_device_dma *dma = dev->dma;
1214         int i, ret = 0;
1215         RING_LOCALS;
1216
1217         i830_kernel_lost_context(dev);
1218
1219         BEGIN_LP_RING(2);
1220         OUT_RING(CMD_REPORT_HEAD);
1221         OUT_RING(0);
1222         ADVANCE_LP_RING();
1223
1224         i830_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
1225
1226         for (i = 0; i < dma->buf_count; i++) {
1227                 struct drm_buf *buf = dma->buflist[i];
1228                 drm_i830_buf_priv_t *buf_priv = buf->dev_private;
1229
1230                 int used = cmpxchg(buf_priv->in_use, I830_BUF_HARDWARE,
1231                                    I830_BUF_FREE);
1232
1233                 if (used == I830_BUF_HARDWARE)
1234                         DRM_DEBUG("reclaimed from HARDWARE\n");
1235                 if (used == I830_BUF_CLIENT)
1236                         DRM_DEBUG("still on client\n");
1237         }
1238
1239         return ret;
1240 }
1241
1242 /* Must be called with the lock held */
1243 static void i830_reclaim_buffers(struct drm_device * dev, struct drm_file *file_priv)
1244 {
1245         struct drm_device_dma *dma = dev->dma;
1246         int i;
1247
1248         if (!dma)
1249                 return;
1250         if (!dev->dev_private)
1251                 return;
1252         if (!dma->buflist)
1253                 return;
1254
1255         i830_flush_queue(dev);
1256
1257         for (i = 0; i < dma->buf_count; i++) {
1258                 struct drm_buf *buf = dma->buflist[i];
1259                 drm_i830_buf_priv_t *buf_priv = buf->dev_private;
1260
1261                 if (buf->file_priv == file_priv && buf_priv) {
1262                         int used = cmpxchg(buf_priv->in_use, I830_BUF_CLIENT,
1263                                            I830_BUF_FREE);
1264
1265                         if (used == I830_BUF_CLIENT)
1266                                 DRM_DEBUG("reclaimed from client\n");
1267                         if (buf_priv->currently_mapped == I830_BUF_MAPPED)
1268                                 buf_priv->currently_mapped = I830_BUF_UNMAPPED;
1269                 }
1270         }
1271 }
1272
1273 static int i830_flush_ioctl(struct drm_device *dev, void *data,
1274                             struct drm_file *file_priv)
1275 {
1276         LOCK_TEST_WITH_RETURN(dev, file_priv);
1277
1278         i830_flush_queue(dev);
1279         return 0;
1280 }
1281
1282 static int i830_dma_vertex(struct drm_device *dev, void *data,
1283                            struct drm_file *file_priv)
1284 {
1285         struct drm_device_dma *dma = dev->dma;
1286         drm_i830_private_t *dev_priv = (drm_i830_private_t *) dev->dev_private;
1287         u32 *hw_status = dev_priv->hw_status_page;
1288         drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
1289             dev_priv->sarea_priv;
1290         drm_i830_vertex_t *vertex = data;
1291
1292         LOCK_TEST_WITH_RETURN(dev, file_priv);
1293
1294         DRM_DEBUG("i830 dma vertex, idx %d used %d discard %d\n",
1295                   vertex->idx, vertex->used, vertex->discard);
1296
1297         if (vertex->idx < 0 || vertex->idx > dma->buf_count)
1298                 return -EINVAL;
1299
1300         i830_dma_dispatch_vertex(dev,
1301                                  dma->buflist[vertex->idx],
1302                                  vertex->discard, vertex->used);
1303
1304         sarea_priv->last_enqueue = dev_priv->counter - 1;
1305         sarea_priv->last_dispatch = (int)hw_status[5];
1306
1307         return 0;
1308 }
1309
1310 static int i830_clear_bufs(struct drm_device *dev, void *data,
1311                            struct drm_file *file_priv)
1312 {
1313         drm_i830_clear_t *clear = data;
1314
1315         LOCK_TEST_WITH_RETURN(dev, file_priv);
1316
1317         /* GH: Someone's doing nasty things... */
1318         if (!dev->dev_private) {
1319                 return -EINVAL;
1320         }
1321
1322         i830_dma_dispatch_clear(dev, clear->flags,
1323                                 clear->clear_color,
1324                                 clear->clear_depth, clear->clear_depthmask);
1325         return 0;
1326 }
1327
1328 static int i830_swap_bufs(struct drm_device *dev, void *data,
1329                           struct drm_file *file_priv)
1330 {
1331         DRM_DEBUG("i830_swap_bufs\n");
1332
1333         LOCK_TEST_WITH_RETURN(dev, file_priv);
1334
1335         i830_dma_dispatch_swap(dev);
1336         return 0;
1337 }
1338
1339 /* Not sure why this isn't set all the time:
1340  */
1341 static void i830_do_init_pageflip(struct drm_device * dev)
1342 {
1343         drm_i830_private_t *dev_priv = dev->dev_private;
1344
1345         DRM_DEBUG("%s\n", __func__);
1346         dev_priv->page_flipping = 1;
1347         dev_priv->current_page = 0;
1348         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
1349 }
1350
1351 static int i830_do_cleanup_pageflip(struct drm_device * dev)
1352 {
1353         drm_i830_private_t *dev_priv = dev->dev_private;
1354
1355         DRM_DEBUG("%s\n", __func__);
1356         if (dev_priv->current_page != 0)
1357                 i830_dma_dispatch_flip(dev);
1358
1359         dev_priv->page_flipping = 0;
1360         return 0;
1361 }
1362
1363 static int i830_flip_bufs(struct drm_device *dev, void *data,
1364                           struct drm_file *file_priv)
1365 {
1366         drm_i830_private_t *dev_priv = dev->dev_private;
1367
1368         DRM_DEBUG("%s\n", __func__);
1369
1370         LOCK_TEST_WITH_RETURN(dev, file_priv);
1371
1372         if (!dev_priv->page_flipping)
1373                 i830_do_init_pageflip(dev);
1374
1375         i830_dma_dispatch_flip(dev);
1376         return 0;
1377 }
1378
1379 static int i830_getage(struct drm_device *dev, void *data,
1380                        struct drm_file *file_priv)
1381 {
1382         drm_i830_private_t *dev_priv = (drm_i830_private_t *) dev->dev_private;
1383         u32 *hw_status = dev_priv->hw_status_page;
1384         drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
1385             dev_priv->sarea_priv;
1386
1387         sarea_priv->last_dispatch = (int)hw_status[5];
1388         return 0;
1389 }
1390
1391 static int i830_getbuf(struct drm_device *dev, void *data,
1392                        struct drm_file *file_priv)
1393 {
1394         int retcode = 0;
1395         drm_i830_dma_t *d = data;
1396         drm_i830_private_t *dev_priv = (drm_i830_private_t *) dev->dev_private;
1397         u32 *hw_status = dev_priv->hw_status_page;
1398         drm_i830_sarea_t *sarea_priv = (drm_i830_sarea_t *)
1399             dev_priv->sarea_priv;
1400
1401         DRM_DEBUG("getbuf\n");
1402
1403         LOCK_TEST_WITH_RETURN(dev, file_priv);
1404
1405         d->granted = 0;
1406
1407         retcode = i830_dma_get_buffer(dev, d, file_priv);
1408
1409         DRM_DEBUG("i830_dma: %d returning %d, granted = %d\n",
1410                   task_pid_nr(current), retcode, d->granted);
1411
1412         sarea_priv->last_dispatch = (int)hw_status[5];
1413
1414         return retcode;
1415 }
1416
1417 static int i830_copybuf(struct drm_device *dev, void *data,
1418                         struct drm_file *file_priv)
1419 {
1420         /* Never copy - 2.4.x doesn't need it */
1421         return 0;
1422 }
1423
1424 static int i830_docopy(struct drm_device *dev, void *data,
1425                        struct drm_file *file_priv)
1426 {
1427         return 0;
1428 }
1429
1430 static int i830_getparam(struct drm_device *dev, void *data,
1431                          struct drm_file *file_priv)
1432 {
1433         drm_i830_private_t *dev_priv = dev->dev_private;
1434         drm_i830_getparam_t *param = data;
1435         int value;
1436
1437         if (!dev_priv) {
1438                 DRM_ERROR("%s called with no initialization\n", __func__);
1439                 return -EINVAL;
1440         }
1441
1442         switch (param->param) {
1443         case I830_PARAM_IRQ_ACTIVE:
1444                 value = dev->irq_enabled;
1445                 break;
1446         default:
1447                 return -EINVAL;
1448         }
1449
1450         if (copy_to_user(param->value, &value, sizeof(int))) {
1451                 DRM_ERROR("copy_to_user\n");
1452                 return -EFAULT;
1453         }
1454
1455         return 0;
1456 }
1457
1458 static int i830_setparam(struct drm_device *dev, void *data,
1459                          struct drm_file *file_priv)
1460 {
1461         drm_i830_private_t *dev_priv = dev->dev_private;
1462         drm_i830_setparam_t *param = data;
1463
1464         if (!dev_priv) {
1465                 DRM_ERROR("%s called with no initialization\n", __func__);
1466                 return -EINVAL;
1467         }
1468
1469         switch (param->param) {
1470         case I830_SETPARAM_USE_MI_BATCHBUFFER_START:
1471                 dev_priv->use_mi_batchbuffer_start = param->value;
1472                 break;
1473         default:
1474                 return -EINVAL;
1475         }
1476
1477         return 0;
1478 }
1479
1480 int i830_driver_load(struct drm_device *dev, unsigned long flags)
1481 {
1482         /* i830 has 4 more counters */
1483         dev->counters += 4;
1484         dev->types[6] = _DRM_STAT_IRQ;
1485         dev->types[7] = _DRM_STAT_PRIMARY;
1486         dev->types[8] = _DRM_STAT_SECONDARY;
1487         dev->types[9] = _DRM_STAT_DMA;
1488
1489         return 0;
1490 }
1491
1492 void i830_driver_lastclose(struct drm_device * dev)
1493 {
1494         i830_dma_cleanup(dev);
1495 }
1496
1497 void i830_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
1498 {
1499         if (dev->dev_private) {
1500                 drm_i830_private_t *dev_priv = dev->dev_private;
1501                 if (dev_priv->page_flipping) {
1502                         i830_do_cleanup_pageflip(dev);
1503                 }
1504         }
1505 }
1506
1507 void i830_driver_reclaim_buffers_locked(struct drm_device * dev, struct drm_file *file_priv)
1508 {
1509         i830_reclaim_buffers(dev, file_priv);
1510 }
1511
1512 int i830_driver_dma_quiescent(struct drm_device * dev)
1513 {
1514         i830_dma_quiescent(dev);
1515         return 0;
1516 }
1517
1518 struct drm_ioctl_desc i830_ioctls[] = {
1519         DRM_IOCTL_DEF(DRM_I830_INIT, i830_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1520         DRM_IOCTL_DEF(DRM_I830_VERTEX, i830_dma_vertex, DRM_AUTH),
1521         DRM_IOCTL_DEF(DRM_I830_CLEAR, i830_clear_bufs, DRM_AUTH),
1522         DRM_IOCTL_DEF(DRM_I830_FLUSH, i830_flush_ioctl, DRM_AUTH),
1523         DRM_IOCTL_DEF(DRM_I830_GETAGE, i830_getage, DRM_AUTH),
1524         DRM_IOCTL_DEF(DRM_I830_GETBUF, i830_getbuf, DRM_AUTH),
1525         DRM_IOCTL_DEF(DRM_I830_SWAP, i830_swap_bufs, DRM_AUTH),
1526         DRM_IOCTL_DEF(DRM_I830_COPY, i830_copybuf, DRM_AUTH),
1527         DRM_IOCTL_DEF(DRM_I830_DOCOPY, i830_docopy, DRM_AUTH),
1528         DRM_IOCTL_DEF(DRM_I830_FLIP, i830_flip_bufs, DRM_AUTH),
1529         DRM_IOCTL_DEF(DRM_I830_IRQ_EMIT, i830_irq_emit, DRM_AUTH),
1530         DRM_IOCTL_DEF(DRM_I830_IRQ_WAIT, i830_irq_wait, DRM_AUTH),
1531         DRM_IOCTL_DEF(DRM_I830_GETPARAM, i830_getparam, DRM_AUTH),
1532         DRM_IOCTL_DEF(DRM_I830_SETPARAM, i830_setparam, DRM_AUTH)
1533 };
1534
1535 int i830_max_ioctl = DRM_ARRAY_SIZE(i830_ioctls);
1536
1537 /**
1538  * Determine if the device really is AGP or not.
1539  *
1540  * All Intel graphics chipsets are treated as AGP, even if they are really
1541  * PCI-e.
1542  *
1543  * \param dev   The device to be tested.
1544  *
1545  * \returns
1546  * A value of 1 is always retured to indictate every i8xx is AGP.
1547  */
1548 int i830_driver_device_is_agp(struct drm_device * dev)
1549 {
1550         return 1;
1551 }